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Offset Detector

Measure the offset between the video clock and the sensor clock
Video Annotator Guide

1 · Video

no video loaded
Load the video of the test (e.g. the SPPB sit-to-stand).
0:00 / 0:00
speed
00:00:00.000 frame 0 clock —

space play/pause ,/. frame ←/→ 1 s v mark video enter add event

2 · Sensor data (EUROBENCH, full session)

Load EUROBENCH_DATA/SUBJECT_XX/SESSION_YY/CLINICAL/acceleration.csv.

acceleration (g)
Scroll to zoom · drag to pan · click to mark the sensor time
video position (with the current offset) sensor mark added events

Events (0)

#LabelVideo clockSensorOffsetΔ
No events yet.

Δ = difference from the mean offset; a large Δ suggests a mismarked event. Events are kept only while this page is open.

Offset

no events yet
Mark the same moment in the video and in the sensors, then add it.
Enter this number in the Video Annotator's Offset (s). Positive: the video clock is ahead of the sensors. For now the same offset is used for all iPhone clips of the session.

3 · Mark an event

Video
—
Sensors
— click the plot
Offset of this event —